Furnace-grate.



J. n. GEORGE.

Patented Ian. 8, l90l.

FURNACE GRATE.

(Application filed Nov. 19, 1898.)

2 Sheets-Shet I.

(No Model.)

e e zefij Jerome fl. Geor ge,

UN TTED STATES PATENT OFFicE.

JEROME R. GEORGE, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CHARLESL. MILLER, OF J OLIE'I, ILLINOIS.

FU RNACE-G RATE.

SPECIFICATION forming part of Letters Patent No. 665,675, dated January8, 1901.

Application filed November 19, 1898. Serial No. 696,915. (No model.)

To 61 whom, it may concern.-

Be it known that I, JEROME R. GEORGE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Furnace-Grates, of whichthe following is a specification.

My invention relates to that class of furnace-grates which are known asshakinggrates, andparticularly to the construction of the individualbars which go to make up the grate.

The object of my invention is to provide a simple, economical, andefficient grate-bar; and the invention consists in the features,combinations, and details of construction hereinafter described andclaimed.

In the accompanying drawings, Figure 1 is a vertical sectional elevationtaken through a furnace and showing my improved gratebars in operativeposition; Fig. 2, a similar view showing the bars in the position theyassume during the operation of shaking; Fig. 3, a similar view showingthe bars in the dumping position; Fig. 4, a side elevation of one of myimproved bars, shown partly in section; Fig. 5, aplan view of a barconstructed in accordance with my improvements, and Fig. 6 a transversesectional view taken on the line 6 of Fig. 4.

In the art to which this invention relates it is well known thatfurnace-users are desirous of obtaining a simple and economical gratewhich will admit as much air as possible to the fuel, not interfere withthe strength of the individual bars, and at the same time enable thefire to be easily cleaned. The principal object of my invention,therefore, is to provide a grate which will give the users theadvantages above named.

In constructing a grate-bar in accordance with my improvements I make agrate-bar and provide it with a multiplicity of transverse bars A andconnect them together at their ends by means of curved side bars a and aand at the center portion by means of a strengthening-rib B. Thesetransverse side bars and strengthening-ribs are so arranged that theirupper sides lie in a plane below the upper surfaces of the transversebars, so as to form a plurality of transverse grooves which extend clearacross the bar, as particularly shown in Fig. 6, and permit the air toreach the largest amount of fuel possible and provide a construction inwhich the least amount of material is used consistent with the maximumamount of strength.

In order to hold the bar in position, it is provided with trunnions Oand O at each end thereof, arranged at or near the longitudinal centerof the bar and adapted to rest in recesses in the side walls (not shown)arranged for the same. This arrangement provides an evenly-balanced barand permits it to oscillate or shake whenever it is desirable ornecessary. Each bar is further provided with depending arms D, havingprojections (1 extending therefrom and to which, as shown in Figs. 1 to3, a connecting-rod E is pivotally secured by means of the pins 6. Theouter end of this connecting-rod is secured to a shaking-lever G,arranged, preferably, outside of and in front of the furnace.

An inspection of Fig. 6 will show that the side bars of the individualgrate-bars are curved at their outer surfaces concentric with the axesofthe trunnions upon which the bars swing, so that the bars may be swungpast each other into the position shown in Fig. 2 and shake the grate,agitating the mass of fuel thereon, and without increasing the size ofthe opening between the grate-bars a material advantage in furnaceswhere fuel is used that burns to a clear ash. This kind of grate-baralso prevents the clogging of furnaces that use fuel where clinkersform, for the reason that there is no danger of the clinker-s droppingbetween intermeshin g bars, and thus interfering with the operation ofshaking. v

I claim- 1. A flat grate-bar, the component parts of which are integraland consist of a multiplicity of transverse bars, a central longitudinalstrengthening-rib of the full depth of the body of the bar with itsupper surface below the upper surface of the transverse bars, twotrunnions for mounting the gratebar as a whole at its ends, and two sidebars, each side bar having a curved outer face on a line concentric withthe center of the trunnions and having depressions in its top edgeforming air spaces between the transverse bars, substantially asdescribed.

2. A fiat grate-bar the component parts of which are integral andconsist of a multi plicity of transverse bars, a central longitudinalstrengthening-rib of the full depth of the body of the transverse barswith its u pper surface below the upper surface of the transverse bars,two trunnions for mounting the grate-bar as a whole at its ends, eachtrunnion located in line with the strengthening-rib, and two side barseach side bar of a less depth than the transverse bars leavingair-spaces between the upper face of the side bars and the upper face ofthe transverse bars, eachside bar having a curved outer face on a lineconcentric with the axes of the trunnions, substantially as described.

3. A fiat grate-bar the component parts of which are integral andconsist of a multiplicity of transverse bars, a central longitudinalstrengthening-rib of the full depth of the body of the grate and withits upper surface below the upper surface of the transverse bars, twotrunnions for mounting the grate-bar as a whole at its end, two sidebars each side bar of a less depth than the transverse bars leaving anair-space between the upper faces of the side bars and the transversebars, each side bar having a curved outer face on a line concentric withthe axes of the trunnions, and a depending arm at one end of thegrate-bar, substantially as described.

JEROME R. GEORGE. Witnesses:

THOMAS F. SHERIDAN, THOMAS E. MCGREGOR.

